Eccentric link driven horizontal pinch feed

Abstract

The utility model relates to eccentric connecting rod drive horizontal material clamping conveying device, including frame, conveying guide structure, material clamping subassembly and eccentric wheel connecting rod drive subassembly. Eccentric wheel connecting rod drive subassembly includes floating drive arm, eccentric wheel, the upper part of floating drive arm is rotatable connected with material clamping subassembly, and the middle part is slidably fitted with upper linkage, and the lower part is slidably fitted with lower linkage, the upper linkage is eccentric and is rotatable connected on the eccentric wheel, and the eccentric wheel is linked with drive source, and the lower linkage is rotatable positioned on the frame, the utility model discloses through floating drive arm cooperation upper and lower linkage and forms the floating connecting rod mechanism of double point constraint, and the horizontal reciprocating motion of material clamping subassembly is converted to eccentric wheel rotary motion, and the transmission chain is short, and the movement is stable, and material clamping subassembly can continuously hold paper in the whole process of ironing and pressing, effectively prevents paper displacement, improves the register accuracy.

Description

Technical Field

[0001] This utility model specifically relates to an eccentric connecting rod driven horizontal clamping and conveying device. Background Technology

[0002] The main function of the paper conveying mechanism in a hot stamping / die-cutting machine is to accurately and stably transport the paper to be processed to the hot stamping / die-cutting station, directly affecting the registration accuracy of hot stamping, the quality of die-cutting, and the production efficiency of the equipment. To improve the automation level of paper conveying, Chinese invention patent document CN106629158B discloses a hot stamping / die-cutting machine, including an upper template, a lower template, and a paper conveying device. Its paper conveying device uses a robotic arm transfer mechanism in conjunction with a transmission mechanism to achieve paper conveying. Specifically, a power source drives a swing arm to swing left and right, which drives the input transmission wheel to rotate. After two stages of speed-increasing acceleration by a speed-increasing bridge wheel, it drives the output transmission wheel and sprocket chain to move. Suction cups on the chain adsorb the paper, conveying it from the bottom to the lower template worktable. During the process of the lower template flipping and fitting with the upper template, the main shaft drives a cam and a cable to pull a push gauge, completing the lateral alignment of the paper. However, in actual high-speed hot stamping / die-cutting production, this existing technology still suffers from insufficient conveying accuracy and poor hot stamping positioning stability. First, the existing conveying system requires multiple stages of transmission, including a motor, drive wheel, connecting rod, swing arm, input transmission wheel, speed-increasing bridge wheel, output transmission wheel, sprocket, and chain. The lengthy transmission chain results in high energy loss and low transmission efficiency. Furthermore, the meshing clearance of each gear accumulates progressively, further reducing transmission accuracy. At the same time, as a flexible transmission component, the chain has inherent elastic deformation and wear elongation issues. After long-term use, the chain pitch increases, and the conveying positioning accuracy gradually decreases. Moreover, the chain exhibits polygonal effects and vibrations during operation, resulting in poor conveying stability at high speeds, making it difficult to meet the positioning requirements of high-precision hot stamping and die-cutting.

[0003] Secondly, the lack of paper clamping during hot stamping makes it prone to displacement, leading to decreased registration accuracy. In this existing technology, the suction cup only holds the paper during the conveying stage and releases it after it reaches the lower template worktable. Throughout the hot stamping process, the paper remains unclamped, temporarily held only by the pressure and static friction of the upper and lower templates. Under the combined effects of the impact force at the moment the templates close, paper rebound, and equipment vibration, the paper is highly susceptible to slight displacement or deflection, directly causing hot stamping registration misalignment, die-cutting position deviation, and increased scrap rate. This paper displacement problem is particularly pronounced under high-speed production conditions, directly affecting the accuracy of hot stamping or die-cutting. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an eccentric linkage driven horizontal clamping and conveying device that has a short transmission chain, good motion stability, high conveying accuracy, and can continuously clamp the paper to prevent displacement throughout the hot pressing process, in order to address the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an eccentric linkage driven horizontal clamping and conveying device, comprising a frame, a conveying guide structure fixed on the frame, a clamping assembly slidably engaged along the conveying guide structure, and an eccentric wheel linkage drive assembly for driving the clamping assembly to reciprocate relative to the conveying guide structure, characterized in that: the eccentric wheel linkage drive assembly includes a floating drive arm and an eccentric wheel; the upper part of the floating drive arm is rotatably connected to the clamping assembly, the middle part of the floating drive arm is slidably engaged with an upper linkage member, the lower part of the floating drive arm is slidably engaged with a lower linkage member, and the lower linkage member is rotatably positioned on the frame; the upper linkage member is eccentrically disposed on the eccentric wheel, and the upper linkage member is rotatably connected to the eccentric wheel, and the middle part of the eccentric wheel is linked with a drive source for driving the eccentric wheel to rotate.

[0006] The above technical solution utilizes a floating drive arm in conjunction with upper and lower linkage components to form a floating linkage mechanism with dual-point constraints. This mechanism directly converts the rotational motion of the eccentric wheel into the horizontal reciprocating motion of the clamping assembly. Driven by the eccentric wheel linkage, it achieves horizontal paper feeding throughout the entire process, eliminating height differences during paper feeding and preventing paper posture deviation caused by these differences. The short transmission chain and high transmission efficiency, along with the sliding engagement of both the upper and lower linkage components with the floating drive arm, ensure balanced force distribution and smooth movement of the floating drive arm. This effectively avoids the accumulation of transmission errors and vibration problems associated with multi-stage gear and chain drives, thereby improving the conveying and positioning accuracy.

[0007] Preferably, the upper linkage component includes an upper linkage slider and a first rotating component fixedly connected to the upper linkage slider. The eccentric wheel is eccentrically provided with a first linkage hole, and a first bearing is provided in the first linkage hole. The end of the first rotating component away from the upper linkage slider is rotatably assembled at the first bearing. The upper linkage slider is slidably engaged with the floating drive arm.

[0008] Using the above technical solution, when the eccentric wheel rotates, the end of the first rotating component rotates within the first bearing, while the upper linkage slider slides on the floating drive arm, converting the rotational motion of the eccentric wheel into the reciprocating sliding of the upper linkage slider along the floating drive arm. The first bearing transforms the rotational friction between the first rotating component and the eccentric wheel into rolling friction, reducing frictional resistance, improving transmission efficiency, reducing wear, and extending service life. The sliding cooperation between the upper linkage slider and the floating drive arm allows the upper linkage component to adaptively adjust its position along the floating drive arm while transmitting driving force, ensuring the freedom of movement of the floating drive arm during the swinging process and making the movement more flexible and smooth.

[0009] Preferably, the lower linkage component includes a lower linkage slider and a second rotating component fixedly connected to the lower linkage slider. The frame is provided with a mounting plate located below the eccentric wheel. The mounting plate has a second linkage hole, and a second bearing is provided in the second linkage hole. The end of the second rotating component away from the lower linkage slider is rotatably assembled in the second bearing. The lower linkage slider is in sliding cooperation with the floating drive arm.

[0010] Using the above technical solution, during operation, the end of the second rotating component rotates within the second bearing, while the lower linkage slider slides on the floating drive arm. This allows the lower part of the floating drive arm to both rotate around the second rotating component on the mounting plate and slide along the length of the floating drive arm. The second bearing also transforms rotational friction into rolling friction, reducing friction loss. The mounting plate is located below the eccentric wheel, ensuring that the rotation fulcrum of the lower linkage component is below the eccentric wheel, creating a staggered arrangement with the upper linkage component. This facilitates the formation of a stable lever swing structure in the floating drive arm, improving the stability of the mechanism's motion.

[0011] Preferably, the floating drive arm includes a floating drive plate and a first guide rail fixed to the floating drive plate by screws, and the upper linkage slider and the lower linkage slider are both slidably engaged with the first guide rail.

[0012] By adopting the above technical solution, during operation, the upper and lower linkage sliders slide along the same first guide rail, keeping their sliding trajectories collinear. This ensures the consistency of the movement direction of the upper and lower linkage components on the floating drive arm, avoids motion interference caused by sliding trajectory deviation, and further improves the stability and motion accuracy of the floating drive arm's swing.

[0013] Preferably, the floating drive plate has a plurality of first weight-reducing holes, and the eccentric wheel has a plurality of second weight-reducing holes that penetrate the eccentric wheel.

[0014] By adopting the above technical solution, the first weight-reducing hole reduces the overall mass of the floating drive arm, thereby reducing the inertial force of the floating drive arm during reciprocating swing; the second weight-reducing hole reduces the rotational inertia of the eccentric wheel, thereby reducing the inertial torque of the eccentric wheel during rotation. The reduction in overall mass reduces the starting and stopping impact of the mechanism during high-speed reciprocating motion, making the motion smoother, while also reducing the load on the drive source, which is beneficial to improving the operating speed of the equipment.

[0015] Preferably, the first rotating member has a first positioning groove on its end face facing the upper linkage slider, and a plurality of first screw holes are provided in the first positioning groove. The upper linkage slider is inserted into the first positioning groove and is fastened to the first screw holes by providing a first fastener. The second rotating member has a second positioning groove on its end face facing the lower linkage slider, and a plurality of second screw holes are provided in the second positioning groove. The lower linkage slider is inserted into the second positioning groove and is fastened to the second screw holes by providing a second fastener.

[0016] By adopting the above technical solution, the positioning groove plays a role in pre-positioning and limiting the slider, enabling the slider to be quickly and accurately aligned during assembly, thus improving assembly efficiency. At the same time, the positioning groove restricts the relative rotation between the slider and the rotating parts, and together with the screw fastening, ensures the reliability of the connection between the slider and the rotating parts and the positional stability during long-term use.

[0017] Preferably, the conveying guide structure includes at least two second guide rails arranged parallel to each other, and the clamping assembly includes a main moving plate that slides with the second guide rails and at least two clamping manipulators mounted on the main moving plate and arranged sequentially along the second guide rails; Each of the clamping manipulators includes a clamping mounting base fixed to the main moving plate and a clamping cylinder fixed below the clamping mounting base. Several clamping springs are mounted above the clamping mounting base and arranged sequentially along the second guide rail. A fixed clamping plate is provided below each clamping spring and is fixed to the clamping mounting base. One end of the clamping spring is fixedly connected to the clamping mounting base, and the other end of the clamping spring is connected to a connecting rod. The output rod of the clamping cylinder is linked to a clamping lifting plate. The clamping lifting plate is simultaneously connected to several connecting rods. A strip-shaped clearance hole is opened on the fixed clamping plate corresponding to the connecting rod.

[0018] Using the above technical solution, the clamping cylinder drives the clamping lifting plate to rise and fall. The clamping lifting plate, through several connecting rods, simultaneously drives the corresponding clamping spring ends to rise or fall. When the clamping spring ends rise, the material can enter between the clamping spring and the fixed clamping piece; when the clamping spring ends fall, the material is elastically clamped between the clamping spring and the fixed clamping piece. This structure achieves multi-point synchronous clamping under a single power source drive by simultaneously linking multiple clamping springs through a single clamping cylinder, the clamping lifting plate, and connecting rods. The force at each clamping point is uniform, and the material is not easily deflected. The elastic clamping method is well adapted to thin sheet materials and is not easy to damage the material surface. More importantly, since the clamping mechanism can move horizontally along the second guide rail with the main moving plate and maintains elastic clamping of the material during the conveying process, the clamps do not need to exit the station during the hot stamping pressure process. The paper can be kept in a clamped state to complete the hot stamping, eliminating the problems of paper suspension and offset and hot stamping skew, and greatly improving the hot stamping registration accuracy.

[0019] Preferably, the end of the clamping spring is provided with a bent clamping hook.

[0020] By adopting the above technical solution, the clamping hook catches the edge of the material when the clamping spring is pressed down, forming a hook-like anti-detachment constraint on the material, which further enhances the positioning ability of the clamping mechanism for the material, effectively prevents the material from slipping off the clamping end when it is conveyed at high speed or subjected to impact, and improves the reliability of clamping.

[0021] Preferably, the clamping mounting base includes an upper clamping fixing plate and a lower clamping fixing plate arranged on the side of the upper clamping fixing plate; the upper clamping fixing plate is fixed to the upper surface of the main moving plate by screws, and the clamping spring and the fixed clamping piece are both installed on the upper clamping fixing plate; a connecting block is connected to the middle of the lower clamping fixing plate, the connecting block is fixedly connected to the side of the main moving plate by screws, and a guide slider is installed on the side of the lower clamping fixing plate; a third guide slide rail is fixed on the frame and slides with the guide slider, the third guide slide rail being arranged parallel to the second guide slide rail; the clamping cylinder is installed in the middle of the lower clamping fixing plate, and guide sleeves are installed on both sides of the lower clamping fixing plate; each guide sleeve is slidably fitted with a guide rod, and the upper end of the guide rod is fixedly connected to the clamping lifting plate.

[0022] Using the above technical solution, the upper clamping fixing plate is responsible for bearing the clamping springs and fixed clamping plates to ensure the clamping function; the lower clamping fixing plate bears the clamping cylinder and, through the cooperation of the guide slider and the third guide rail, provides additional horizontal guiding support for the clamping robot, forming a double-rail guide with the second guide rail, which improves the resistance to lateral forces and the movement stability of the main moving plate during horizontal movement; the guide rods on both sides of the clamping lifting plate cooperate with the guide sleeves to provide vertical guidance for the lifting movement of the clamping lifting plate, ensuring the verticality of the lifting movement of the clamping lifting plate, making the movement synchronization of each link better, and the clamping action of each clamping spring more consistent.

[0023] Preferably, a U-shaped rotating seat is fixed below the main moving plate, the upper part of the floating drive arm is inserted into the middle of the U-shaped rotating seat, and the upper part of the floating drive arm is rotatably connected to the U-shaped rotating seat by setting a rotating shaft.

[0024] Using the above technical solution, the upper part of the floating drive arm is inserted into the opening in the middle of the U-shaped rotating seat, and the rotating shaft passes through the two side walls of the U-shaped rotating seat and the upper part of the floating drive arm, forming a double-sided support hinge structure. The U-shaped rotating seat provides symmetrical support to the upper part of the floating drive arm on both sides. Compared with a single-sided hinge, the force is more evenly distributed, the connection stiffness is higher, the torsional resistance is stronger, and it can withstand greater off-center loads and impact forces, improving the reliability of the transmission connection and the stability of long-term use. In addition, since the floating drive arm is connected to the lower part of the main moving plate through the U-shaped rotating seat, and in conjunction with the horizontal conveying guide structure, the feeding robot does not need to extend outward to avoid obstacles during the unloading stage, simplifying mechanical actions, shortening the reciprocating stroke of the robot, and helping to improve production cycle efficiency.

[0025] The beneficial effects of this utility model are as follows: A floating linkage mechanism with a floating drive arm, upper and lower linkages forming a double-point constraint, directly converts the rotational motion of the eccentric wheel into the horizontal reciprocating motion of the clamping assembly. Horizontal paper feeding is achieved throughout the entire process via the eccentric wheel linkage drive, eliminating height differences during paper feeding and preventing paper posture deviation caused by height differences. The transmission chain is short and efficient, and both the upper and lower linkages slide with the floating drive arm, ensuring balanced force distribution and smooth movement. This effectively avoids the accumulation of transmission errors and vibration problems caused by multi-stage gear and chain transmissions, improving conveying and positioning accuracy. Simultaneously, the elastic clamping mechanism, with its clamping spring and fixed clamp, continuously clamps the paper throughout the hot stamping pressure process, eliminating the need for the clamps to retract from the workstation and preventing paper suspension and offset, as well as hot stamping skew, significantly improving hot stamping registration accuracy. During the unloading stage, the feeding robot does not need to extend outwards to avoid obstacles, simplifying mechanical actions, shortening the reciprocating stroke, and improving production cycle efficiency.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly state of the floating drive arm and the upper and lower linkage components according to an embodiment of the present utility model. Figure 4 This is a schematic diagram of the clamping robot structure according to an embodiment of the present utility model; Figure 5 This is an exploded view of the clamping robot according to an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0028] Labeling Explanation: Floating drive arm 1, Eccentric wheel 2, First linkage hole 201, First bearing 202, Second weight reduction hole 203, Upper linkage component 3, Lower linkage component 4, Drive source 5, Second guide rail 6, Mounting plate 7, Main moving plate 8, Clamping robot 9, U-shaped rotating seat 10, Third guide rail 11, Clamping mounting seat 12, Clamping cylinder 13, Clamping spring 14, Fixed clamping piece 15, Connecting rod 16, Clamping lifting plate 17, Strip-shaped clearance hole 18, Clamping Material hook body 19; upper linkage slider 301, first rotating component 302, first positioning groove 303, first screw hole 304; lower linkage slider 401, second rotating component 402; second linkage hole 701, second bearing 702, floating drive plate 101, first guide slide rail 102, first weight reduction hole 103, upper clamping fixing plate 121, lower clamping fixing plate 122, connecting block 123, guide slider 124, guide sleeve 125, guide rod 126. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 6The eccentric linkage-driven horizontal clamping and conveying device shown includes a frame, a conveying guide structure fixed to the frame, a clamping assembly slidingly fitted along the conveying guide structure, and an eccentric wheel linkage drive assembly that drives the clamping assembly to reciprocate relative to the conveying guide structure. The conveying guide structure includes two parallel second guide rails 6, which are fixedly mounted on the frame to provide guidance and support for the horizontal reciprocating movement of the clamping assembly. The parallel arrangement of the two rails effectively improves guiding accuracy and resistance to lateral forces.

[0031] The eccentric wheel linkage drive assembly includes a floating drive arm 1 and an eccentric wheel 2. The upper part of the floating drive arm 1 is rotatably connected to the clamping assembly, used to transmit driving force to the clamping assembly; an upper linkage 3 is slidably fitted in the middle of the floating drive arm 1, and a lower linkage 4 is slidably fitted in the lower part of the floating drive arm 1. The upper linkage 3 is eccentrically mounted on the eccentric wheel 2 and rotatably connected to the eccentric wheel 2. A drive source 5, preferably a servo motor, is linked in the middle of the eccentric wheel 2 to drive its rotation, and can precisely control the speed and angle of rotation of the eccentric wheel 2. The lower linkage 4 is rotatably positioned on the frame, providing a lower rotational fulcrum constraint for the floating drive arm 1. The floating linkage mechanism, which forms a double-point constraint by the floating drive arm 1 in conjunction with the upper linkage 3 and the lower linkage 4, converts the rotational motion of the eccentric wheel 2 into the horizontal reciprocating motion of the clamping assembly. The transmission chain is short and the transmission efficiency is high. Furthermore, the upper linkage 3 and the lower linkage 4 are both in sliding contact with the floating drive arm 1, so that the floating drive arm 1 is subjected to balanced force during the movement and has good motion stability.

[0032] Specifically, the upper linkage component 3 includes an upper linkage slider 301 and a first rotating component 302 fixedly connected to the upper linkage slider 301. An eccentric first linkage hole 201 is eccentrically provided on the eccentric wheel 2, and a first bearing 202 is disposed within the first linkage hole 201. The end of the first rotating component 302 away from the upper linkage slider 301 is mounted at the first bearing 202, and the upper linkage slider 301 slides in engagement with the floating drive arm 1. The first bearing 202 transforms the rotational friction between the first rotating component 302 and the eccentric wheel 2 into rolling friction, reducing frictional resistance, improving transmission efficiency, and simultaneously reducing wear and extending service life. The sliding engagement between the upper linkage slider 301 and the floating drive arm 1 allows the upper linkage component 3 to adaptively adjust its position along the floating drive arm 1 while transmitting driving force, ensuring the degree of freedom of movement of the floating drive arm 1 during its swinging process.

[0033] The lower linkage component 4 includes a lower linkage slider 401 and a second rotating component 402 fixedly connected to the lower linkage slider 401. A mounting plate 7 is provided on the frame below the eccentric wheel 2. A second linkage hole 701 is provided on the mounting plate 7, and a second bearing 702 is disposed within the second linkage hole 701. The end of the second rotating component 402 away from the lower linkage slider 401 is rotatably mounted within the second bearing 702. The lower linkage slider 401 slides in contact with the floating drive arm 1. The second bearing 702 also converts rotational friction into rolling friction, reducing friction loss. The mounting plate 7 is located below the eccentric wheel 2, so that the rotation fulcrum of the lower linkage component 4 is located below the eccentric wheel 2, forming a staggered arrangement with the upper linkage component 3, which is beneficial for the floating drive arm 1 to form a stable lever swing structure.

[0034] Furthermore, the floating drive arm 1 includes a floating drive plate 101 and a first guide rail 102 fixed to the floating drive plate 101 by screws. The upper linkage slider 301 and the lower linkage slider 401 are both slidably engaged with the first guide rail 102. The upper linkage slider 301 and the lower linkage slider 401 slide along the same first guide rail 102, ensuring that their sliding trajectories remain collinear. This guarantees the consistency of the movement direction of the upper linkage component 3 and the lower linkage component 4 on the floating drive arm 1, avoiding motion interference caused by deviations in the sliding trajectory. The floating drive plate 101 has several first weight-reducing holes 103, and the eccentric wheel 2 has several second weight-reducing holes 203 that penetrate the eccentric wheel 2. The first weight-reducing holes 103 reduce the overall mass of the floating drive arm 1, and the second weight-reducing holes 203 reduce the rotational inertia of the eccentric wheel 2. Together, they reduce the inertial force and inertial torque of the mechanism during high-speed reciprocating motion, reducing start-stop impact and making the movement more stable.

[0035] In terms of assembly structure, the first rotating component 302 has a first positioning groove 303 on its end face facing the upper linkage slider 301. The first positioning groove 303 contains several first screw holes 304. The upper linkage slider 301 is inserted into the first positioning groove 303 and is fastened to the first screw holes 304 by first fasteners. The second rotating component 402 has a second positioning groove on its end face facing the lower linkage slider 401. The second positioning groove contains several second screw holes. The lower linkage slider 401 is inserted into the second positioning groove and is fastened to the second screw holes by second fasteners. The positioning grooves serve to pre-position and limit the slider, enabling quick and accurate alignment during assembly, improving assembly efficiency. Simultaneously, they limit the relative rotation between the slider and the rotating component, ensuring connection reliability and positional stability during long-term use.

[0036] The clamping assembly includes a main moving plate 8 that slides with the second guide rail 6, and two clamping manipulators 9 mounted on the main moving plate 8 and arranged sequentially along the second guide rail 6. A U-shaped rotating seat 10 is fixed below the main moving plate 8. The upper part of the floating drive arm 1 is inserted into the middle of the U-shaped rotating seat 10, and the upper part of the floating drive arm 1 is rotatably connected to the U-shaped rotating seat 10 by a rotating shaft. The U-shaped rotating seat 10 provides symmetrical support to the upper part of the floating drive arm 1 on both sides. Compared with a single-sided hinge, the force is more evenly distributed, the connection rigidity is higher, the torsional resistance is stronger, and it can withstand greater off-center loads and impact forces. Furthermore, during the unloading stage, the feeding manipulator does not need to extend outward to avoid obstacles, simplifying the mechanical action and shortening the reciprocating stroke.

[0037] Each clamping robot 9 includes a clamping mounting base 12 fixed to the main moving plate 8 and a clamping cylinder 13 fixed below the clamping mounting base 12. Several clamping springs 14 are mounted above the clamping mounting base 12, arranged sequentially along the second guide rail 6. Each clamping spring 14 has a fixed clamping plate 15 below it, which is fixed to the clamping mounting base 12. One end of the clamping spring 14 is fixedly connected to the clamping mounting base 12, and the other end is connected to a connecting rod 16. The output rod of the clamping cylinder 13 is linked to a clamping lifting plate 17, which is simultaneously connected to several connecting rods 16. A strip-shaped clearance hole 18 is provided on the fixed clamping plate 15 corresponding to the connecting rod 16. The end of the clamping spring 14 is provided with a bent clamping hook 19. When the clamping spring 14 is pressed down, the clamping hook 19 hooks the edge of the material, forming a hook-like anti-detachment constraint, which further enhances the positioning capability of the clamping mechanism for the material. By simultaneously linking multiple clamping springs 14 through a single clamping cylinder 13 via the clamping lifting plate 17 and connecting rod 16, multi-point synchronous clamping under a single power source is achieved. The force is uniform at each clamping point, and the material is not easily deflected. The elastic clamping method is well adapted to thin sheet materials and is not easy to damage the material surface. Moreover, the clamps do not need to withdraw from the station during the hot stamping pressure process. The paper can be kept in a clamped state to complete the hot stamping, eliminating the problems of paper suspension and offset and hot stamping skew.

[0038] The clamping mounting base 12 includes an upper clamping fixing plate 121 and a lower clamping fixing plate 122 arranged on the side of the upper clamping fixing plate 121. The upper clamping fixing plate 121 is fixed to the upper surface of the main moving plate 8 by screws, and the clamping spring 14 and the fixed clamping piece 15 are both fixed on the upper clamping fixing plate 121. A connecting block 123 is connected to the middle of the lower clamping fixing plate 122. The connecting block 123 is fixedly connected to the side of the main moving plate 8 by screws, and a guide slider 124 is installed on the side of the lower clamping fixing plate 122. A third guide slide rail 11 that slides with the guide slider 124 is fixed on the frame. The third guide slide rail 11 is arranged parallel to the second guide slide rail 6. The clamping cylinder 13 is installed in the middle of the lower clamping fixing plate 122. Guide sleeves 125 are installed on both sides of the lower clamping fixing plate 122. Each guide sleeve 125 is slidably fitted with a guide rod 126. The upper end of the guide rod 126 is fixedly connected to the clamping lifting plate 17. The upper clamping fixing plate 121 is responsible for supporting the clamping spring 14 and the fixed clamping piece 15 to ensure the clamping function; the lower clamping fixing plate 122 supports the clamping cylinder 13 and, through the cooperation of the guide slider 124 and the third guide rail 11, provides additional horizontal guiding support for the clamping robot 9, forming a double-rail guide with the second guide rail 6, which improves the resistance to lateral forces and the movement stability of the main moving plate 8 during horizontal movement; the guide rods 126 on both sides of the clamping lifting plate 17 cooperate with the guide sleeve 125 to provide vertical guidance for the lifting movement of the clamping lifting plate 17, ensuring the verticality of the lifting movement of the clamping lifting plate 17, making the movement synchronization of each link 16 better, and the clamping action of each clamping spring 14 more consistent.

[0039] During operation, the drive source 5 drives the eccentric wheel 2 to rotate. Since the upper linkage 3 is eccentrically mounted on the eccentric wheel 2 and the end of the first rotating member 302 rotates within the first bearing 202, the rotational motion of the eccentric wheel 2 is transmitted to the upper linkage slider 301 through the first rotating member 302. The upper linkage slider 301 slides along its length direction on the first guide rail 102 of the floating drive arm 1. At the same time, the lower linkage slider 401 slides along its length direction on the first guide rail 102 of the floating drive arm 1, and the second rotating member 402 of the lower linkage 4 rotates within the second bearing 702, forming a rotation fulcrum constraint on the lower part of the floating drive arm 1. The upper part of the floating drive arm 1 is rotatably connected to the U-shaped rotating seat 10 via a rotating shaft. The U-shaped rotating seat 10 is fixed below the main moving plate 8. The main moving plate 8 slides along the second guide rail 6. Therefore, during the continuous rotation of the eccentric wheel 2, the sliding position of the upper linkage slider 301 on the first guide rail 102 changes periodically, driving the floating drive arm 1 to swing back and forth around the rotation fulcrum of the lower linkage 4, thereby driving the main moving plate 8 to move horizontally back and forth along the second guide rail 6. During horizontal conveying, the clamping cylinder 13 drives the clamping lifting plate 17 to rise and fall. The clamping lifting plate 17, through several connecting rods 16, simultaneously drives the corresponding clamping spring 14 ends to rise or fall. When the clamping spring 14 ends rise, the material can enter between the clamping spring 14 and the fixed clamp 15. When the clamping spring 14 ends fall, the clamping hook 19 hooks the edge of the material, and the material is elastically clamped between the clamping spring 14 and the fixed clamp 15. Furthermore, the entire hot stamping process does not require the clamps to retract from the station, and the paper can remain clamped to complete the hot stamping, eliminating paper suspension and offset issues and skewed hot stamping. During the unloading stage, the clamping cylinder 13 drives the clamping lifting plate 17 to rise, lifting the ends of the clamping spring 14 through the connecting rods 16, releasing the material. During this process, the feeding robot does not need to extend outward to avoid the material, simplifying mechanical actions, shortening the reciprocating stroke, and improving production cycle efficiency.

Claims

1. An eccentric linkage-driven horizontal clamping and conveying device, comprising a frame, a conveying guide structure fixed to the frame, a clamping assembly slidingly engaged along the conveying guide structure, and an eccentric wheel linkage drive assembly for reciprocating movement of the clamping assembly relative to the conveying guide structure, characterized in that: The eccentric wheel linkage drive assembly includes a floating drive arm and an eccentric wheel; The upper part of the floating drive arm is rotatably connected to the clamping assembly, the middle part of the floating drive arm is slidably fitted with an upper linkage component, the lower part of the floating drive arm is slidably fitted with a lower linkage component, and the lower linkage component is rotatably positioned on the frame. The upper linkage is eccentrically mounted on the eccentric wheel, and the upper linkage is rotatably connected to the eccentric wheel. The middle part of the eccentric wheel is linked to a drive source that drives the eccentric wheel to rotate.

2. The off-center link drive horizontal pinch belt conveyor as set forth in claim 1, wherein: The upper linkage component includes an upper linkage slider and a first rotating component fixedly connected to the upper linkage slider. The eccentric wheel is eccentrically provided with a first linkage hole, and a first bearing is provided in the first linkage hole. The end of the first rotating component away from the upper linkage slider is rotatably assembled at the first bearing. The upper linkage slider is slidably engaged with the floating drive arm.

3. The off-center link drive horizontal pinch belt conveyor as set forth in claim 2, wherein: The lower linkage component includes a lower linkage slider and a second rotating component fixedly connected to the lower linkage slider. The frame is provided with a mounting plate located below the eccentric wheel. The mounting plate has a second linkage hole, and a second bearing is provided in the second linkage hole. The end of the second rotating component away from the lower linkage slider is rotatably assembled in the second bearing. The lower linkage slider is in sliding cooperation with the floating drive arm.

4. The off-center link drive horizontal pinch belt conveyor as set forth in claim 3, wherein: The floating drive arm includes a floating drive plate and a first guide rail fixed to the floating drive plate by screws. The upper linkage slider and the lower linkage slider are both slidably engaged with the first guide rail.

5. The off-center link drive horizontal pinch belt conveyor as set forth in claim 4, wherein: The floating drive plate has several first weight reduction holes, and the eccentric wheel has several second weight reduction holes that penetrate the eccentric wheel.

6. The off-center link drive horizontal pinch belt conveyor as set forth in claim 3, wherein: The first rotating component has a first positioning groove on its end face facing the upper linkage slider. The first positioning groove has a plurality of first screw holes. The upper linkage slider is inserted into the first positioning groove and is fastened to the first screw holes by a first fastener. The second rotating component has a second positioning groove on its end face facing the lower linkage slider. The second positioning groove has a plurality of second screw holes. The lower linkage slider is inserted into the second positioning groove and is fastened to the second screw holes by a second fastener.

7. The off-center link drive horizontal pinch belt conveyor of any of claims 1-6, wherein: The conveying and guiding structure includes at least two second guide rails arranged parallel to each other, and the clamping assembly includes a main moving plate that slides with the second guide rails and at least two clamping manipulators mounted on the main moving plate and arranged sequentially along the second guide rails. Each of the clamping manipulators includes a clamping mounting base fixed to the main moving plate and a clamping cylinder fixed below the clamping mounting base. Several clamping springs are mounted above the clamping mounting base and arranged sequentially along the second guide rail. A fixed clamping plate is provided below each clamping spring and is fixed to the clamping mounting base. One end of the clamping spring is fixedly connected to the clamping mounting base, and the other end of the clamping spring is connected to a connecting rod. The output rod of the clamping cylinder is linked to a clamping lifting plate. The clamping lifting plate is simultaneously connected to several connecting rods. A strip-shaped clearance hole is opened on the fixed clamping plate corresponding to the connecting rod.

8. The off-center link drive horizontal pinch belt conveyor as set forth in claim 7, wherein: The end of the clamping spring is provided with a bent clamping hook.

9. The off-center link drive horizontal pinch belt conveyor as set forth in claim 7, wherein: The clamping mounting base includes an upper clamping fixing plate and a lower clamping fixing plate arranged on the side of the upper clamping fixing plate; The upper clamping fixing plate is fixed to the upper surface of the main moving plate by screws, and the clamping spring and the fixed clamp are both installed on the upper clamping fixing plate; A connecting block is connected to the middle of the lower clamping fixing plate. The connecting block is fixedly connected to the side of the main moving plate by screws. A guide slider is installed on the side of the lower clamping fixing plate. A third guide slide rail is fixed on the frame and slides with the guide slider. The third guide slide rail is arranged parallel to the second guide slide rail. The clamping cylinder is installed in the middle of the lower clamping fixing plate. Guide sleeves are installed on both sides of the lower clamping fixing plate. Each guide sleeve slides with a guide rod. The upper end of the guide rod is fixedly connected to the clamping lifting plate.

10. The off-center link drive horizontal pinch belt conveyor as set forth in claim 7, wherein: A U-shaped rotating seat is fixed below the main moving plate, and the upper part of the floating drive arm is inserted into the middle of the U-shaped rotating seat. The upper part of the floating drive arm is rotatably connected to the U-shaped rotating seat by setting a rotating shaft.

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